SCO Unix denies users from logging in

sco-passwd-deny (542) The risk level is classified as LowLow Risk


SCO Unix could deny legitimate users from logging in. This is caused by a vulnerability in the /bin/passwd command.


Denial of Service


No remedy available as of September 1, 2014.


  • CERT Advisory CA-1993-08: SCO /bin/passwd Vulnerability.
  • CVE-1999-1162: Vulnerability in passwd in SCO UNIX 4.0 and earlier allows attackers to cause a denial of service by preventing users from being able to log into the system.
  • OSVDB ID: 7630: SCO UNIX passwd Utility Login DoS

Platforms Affected:

  • SCO SCO Unix


May 24, 1993

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